Dear R users,

in the example below the name of the genus will be displayed in the main 
titles using the variable predictor[i] and paste.
I would like to have the genus name in italic. However all my attempts 
using expression and substitute failed.
Does anybody know a solution? 
Thanks a lot in advance. bernd


Acrobeles      <-c(65.1,0.0,0.0,0.0,0.0,0.0)
Acrobeloides   <-c(0.0,9.8,76.7,51.1,93.9,43.9)
Alaimus        <-c(0.0,4.9,0.0,0.0,0.0,6.3)
Aphelenchoides <-c(126.5,29.3,76.7,134.1,176.7,87.9)

x<-data.frame(Acrobeles,Acrobeloides,Alaimus,Aphelenchoides)

predictor   <- colnames(x)
ylabel      <-"Numerical abundance"
mainlabel1  <-"Boxplot for"
mainlabel2  <-"sp."
cexalabel   <-1.8 # axis label
cexmlabel   <-1.6 # main label

par(oma=c(6,6,3,3),mar = c(6, 4, 4, 2) + 0.1,mfrow=c(2,2))

for (i in 1:ncol(x)){

boxplot(x[,i],
main=paste(mainlabel,predictor[i],mainlabel2),ylab=paste(ylabel),cex.lab=cexalabel,cex.main=cexmlabel,cex.axis=1.5)
}



---------------------------------------------------------------------------

Bernd Panassiti

National Institute of Public Health & the Environment (RIVM)
Laboratory for Ecological Risk Assessment (LER)
P.O. Box 1
3720 BA Bilthoven
The Netherlands
e-mail: bernd.panassiti@rivm.nl
tel. +31 30 274 3647

Radboud University Nijmegen
Department of Environmental Science
b.panassiti@science.ru.nl



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